Building a 300-HP Integra Type S: Realistic Budget & Part Breakdown

The Acura Integra Type S is more than just a stylish hatchback with a 2.0-liter VTEC turbo engine – it’s a tuner’s dream. With the same K20C1 architecture found in the Civic Type R, the Integra Type S leaves considerable headroom for power gains. Many enthusiasts target 300 wheel horsepower (whp) as a daily-driver-friendly balance of performance and reliability. But what does it actually cost to get there? In this expanded guide, we break down every component, from a simple intake to a full turbo upgrade, with realistic price ranges between $200 and $2,500 per part.

The 300-HP Goal: What It Takes

Stock, the Integra Type S delivers around 320 horsepower at the crank (approximately 275-285 whp depending on dyno and conditions). To reach 300 whp – roughly 350 at the crank – you need to improve airflow, fuel delivery, and engine management. Fortunately, the stock turbo can support this power level with the right supporting modifications. The key is a quality ECU tune, which unlocks the engine’s potential while keeping it safe. Below, we detail each upgrade category and the associated costs.

Part-by-Part Cost Breakdown

Engine Management & Tuning ($500 – $1,500)

The most critical upgrade. Without proper tuning, adding parts only risks damage. The two main platforms for the K20C1 are Hondata FlashPro and K-Tuner V2. Both allow you to flash the ECU with a custom or off-the-shelf calibration.

  • Hondata FlashPro (standalone unit): $695 – $795
  • K-Tuner V2 (with base tune): $649 – $749
  • Custom dyno tune (labor): $400 – $700

Many tuners offer a package deal including the device and a remote tune. Expect to spend around $900 for a reliable 300 whp tune. Hondata and K-Tuner provide validated base maps that safely increase boost pressure and adjust cam timing.

Intake System ($200 – $500)

A high-flow intake reduces restriction and improves throttle response. The stock airbox is surprisingly capable, but a well-designed cold air intake can lower intake temperatures and add 10-15 whp when combined with a tune.

  • PRL Motorsports HVI Intake (bolt-on, washable filter): $299 – $349
  • AEM Cold Air Intake: $240 – $280
  • Eventuri Intake (carbon fiber, premium): $600 – $900 (but exceeds $500 budget; a cheaper alternative used or a MAP intake works well)
  • Cheaper silicone hose + high-flow filter combo: $150 – $200

For a 300 hp target, a $200-$400 intake is sufficient. Consider the PRL HVI – it’s proven on many K20C builds.

Exhaust System ($400 – $2,500)

The stock exhaust is restrictive, particularly the catalytic converter and the rear muffler sections. A cat-back exhaust provides a few horsepower and a better sound, while a full turbo-back system (including downpipe and front pipe) can free up 20-30 whp.

  • Cat-back exhaust (e.g., AWE Touring Edition, HKS Legamax): $750 – $1,200
  • Downpipe + Front Pipe (catted or catless): $500 – $1,000
  • Full turbo-back system (downpipe, front pipe, cat-back): $1,500 – $2,500

To hit 300 whp, a downpipe alone plus a tune gives the biggest gain. A full exhaust is optional for the power target but recommended for consistency and sound.

Turbocharger Upgrades ($200 – $2,500)

Surprisingly, you do not need a bigger turbo to reach 300 whp. The stock MHI TD04 turbo can push up to 28 psi safely with proper cooling and fuel. However, many owners opt for a drop-in turbo upgrade for earlier spool and more headroom.

  • Stock turbo + tune + downpipe (cost of tune and downpipe only): $0 for turbo, but requires supporting mods
  • Drop-in turbo upgrade (e.g., PRL 22G-X or Garrett-based): $1,000 – $2,500
  • Full upgraded turbo kit with manifold: $2,000 – $2,500

Budget-conscious builders can skip this category entirely. The stock turbo delivers 300 whp comfortably with a downpipe and ethanol mix (if available).

Intercooler & Charge Piping ($300 – $800)

Heat soak kills power on repeated pulls. The stock intercooler is adequate for short bursts, but upgrading to a larger bar-and-plate unit lowers intake air temperatures by 20-40°F.

  • Front-mount intercooler (e.g., PRL, HKS, Mishimoto): $400 – $700
  • Charge pipe upgrade (aluminum with silicone couplers): $150 – $300

An intercooler is highly recommended for sustained track use or hot climates. For street driving on low boost, the stock unit can suffice.

Fuel System Upgrades ($200 – $1,000)

At 300 whp, the stock high-pressure fuel pump (HPFP) and low-pressure pump are generally adequate if using pump gas (93 octane). But if you plan to run ethanol (E30 or E40), you’ll need fueling upgrades.

  • High-pressure fuel pump (e.g., XDI or K-Series): $500 – $800
  • Fuel injectors (e.g., 1000cc injector dynamics): $600 – $900 (but often not needed at this level)
  • Ethanol content sensor (for flex-fuel kits): $200 – $400

Most 300 whp builds on 93 octane require no fuel system changes. Reserve this category for those wishing to push beyond 350 whp later.

Drivetrain & Clutch ($400 – $1,200)

The stock clutch can handle 300 whp for a while, but if you drive aggressively or plan track days, consider an upgrade. A heavier clutch pedal is a trade-off.

  • Stage 1/2 clutch (e.g., ACT, Exedy, Competition Clutch): $400 – $800
  • Lightweight flywheel (optional): $300 – $600

Budget $600 if your driving style is hard on the clutch. This is a “pay now or pay later” item; a slipping clutch will ruin the driving experience.

Suspension & Handling ($500 – $2,500)

More power demands better control. The Integra Type S already has adaptive dampers, but coilovers offer adjustability and lower center of gravity.

  • Coilovers (e.g., KW, Ohlins, BC Racing): $1,200 – $2,500
  • Rear sway bar (e.g., Eibach, Whiteline): $200 – $350
  • Lowering springs (cheaper alternative to coilovers): $250 – $400

If your primary use is straight-line power, stock suspension works. For corners, a set of coilovers and a rear sway bar transforms the car.

Installation Costs – DIY vs. Shop

Labor can add 30-50% to your total. Most intake, exhaust, and intercooler installations are DIY-friendly with basic tools. Turbo upgrades and custom tuning require more skill or a professional shop. Average shop rates are $100-$150 per hour. Estimate:

  • Full bolt-on installation (intake, exhaust, intercooler): 6-10 hours → $600 – $1,500
  • Clutch replacement: 6-10 hours → similar
  • Tune session (dyno): typically included in custom tune price

If you budget $500-$1,000 for installation, you’ll cover most jobs.

Total Budget Scenarios

Stage 1: The Efficient 300 (approx. $1,500 – $2,000)

  • ECU tune with FlashPro or K-Tuner: $900
  • Downpipe + front pipe: $600
  • Air intake: $300
  • Total parts: ~$1,800 (plus installation if DIY)

This combination reliably nets 290-305 whp on 93 octane. No extra fuel or turbo needed.

Stage 2: Track-Ready 300 (approx. $3,500 – $4,500)

  • All of Stage 1
  • Cat-back exhaust: $800
  • Intercooler: $600
  • Coilovers: $1,500
  • Rear sway bar: $300
  • Clutch upgrade (if needed): $600
  • Total: ~$4,100 – parts only

This setup handles track abuse, reduces heat, and puts power to the ground.

Stage 3: Maxed Stock Turbo (approx. $6,000+ )

  • Stage 2 plus: drop-in turbo upgrade ($2,500), ethanol fueling ($800), upgraded HPFP ($600), larger injectors ($700)

This pushes closer to 370 whp. But 300 hp is achievable without this level of investment.

For further reading and community builds, check these trusted sources:

Final Considerations

Achieving 300 whp in an Integra Type S is not only feasible but surprisingly affordable. The stock turbo and engine internals are robust, and with a tune and a few bolt-ons, you can surpass the goal. The total cost can range from $1,500 for a basic tune-and-downpipe setup to $4,000 for a fully bolstered daily driver. Always prioritize quality parts from reputable manufacturers and invest in a professional tune. Following these guidelines will give you a reliable, thrilling 300-horsepower Integra Type S without breaking the bank.